After completing a multi$-$phase project, you notice that one phase

$2$ points

significantly exceeded its budget. What is the best way to address this in the lessons$-$learned analysis?

a$)$ Attribute the issue to external vendors and move on

b$)$ Analyze why the budget overrun occurred and identify preventive measures

c$)$ Exclude the phase to avoid tainting the overall project review

d$)$ Reduce the variance impact by reallocating costs retroactively